Windows Virtual PC says CPU is not compatible with x64 mode, but Virtual PC is run in a 64 bitbits OS system

Source Link

asked Feb 21, 2019 at 20:28

Windows Virtual PC says CPU is not compatible with x64 mode, but Virtual PC is run in a 64 bit OS system

I'm trying to install a WindowsXP 64 bits in Windows Virtual PC. Windows Virtual PC complains:

Attempting to load an x64 operating system, however this CPU is not compatible with x64 mode. Please install a 32-bit x86 operating system.

But the whole thing is running under a Windows 7 Enterprise 64 bits. How can this be? What coult it be the problem?